Recent theoretical and experimental breakthroughs have made post-selected schemes via GBS as the most promising candidates for generating non-Gaussian states.
GBS devices are capable of preparing highly non-Gaussian states – including GKP qubits – contingent on the observation of a specific detection pattern in the PNR detectors.
This preparation of non-Gaussian states of light including single bosonic qubits using GBS devices has been developed in Refs. [1]}, [2]}, [3]}, [4]}, and we summarize the relevant portions briefly here.
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